JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Online ISSN : 1881-1299
Print ISSN : 0021-9592
Sorption and Separation of Metals from Aqueous Solution by a Macromolecular Resin Containing Tri-n-Octylamine
Shigendo AkitaHirosni Takeuchi
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JOURNAL FREE ACCESS

1990 Volume 23 Issue 4 Pages 439-443

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Abstract
Experiments were conducted on the equilibrium distribution of divalent zinc between hydrochloric acid medium and macromolecular resin containing tri-n-octylamine (TOA) as an active component. The sorption of zinc on the impregnated sorbent can be expressed by the following stoichiometric relation:

ZnCl2(aq.) + 2R3NHCl(s.) ↔ (R3NH)2ZnCl4(s.)

where the equilibrium constant was found to be 3.59 × 105 kg-sorbent·dm3/mol2.
Furthermore the separation of zinc and copper in aqueous solution by use of the sorbent was examined in a batch operation with hydrochloric acid concentrations over 5M. It was found that the sorbent gives high selective separation of zinc to copper, and they can be separated satisfactorily from a 1.0 mol/dm3 hydrochloric acid solution. The applicability of the TOA-impregnated sorbent to column operation is also reported.
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© 1990 The Society of Chemical Engineers, Japan
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